An improved document skew angle estimation technique
Pattern Recognition Letters
Skew angle estimation in document processing using Cohen's class distributions
Pattern Recognition Letters - Special issue on pattern recognition in practice VI
The Document Spectrum for Page Layout Analysis
IEEE Transactions on Pattern Analysis and Machine Intelligence
Skew and Slant Correction for Document Images Using Gradient Direction
ICDAR '97 Proceedings of the 4th International Conference on Document Analysis and Recognition
A simple and efficient skew detection algorithm via text row accumulation
ICDAR '95 Proceedings of the Third International Conference on Document Analysis and Recognition (Volume 2) - Volume 2
Fast and Accurate Detection of Document Skew and Orientation
ICDAR '07 Proceedings of the Ninth International Conference on Document Analysis and Recognition - Volume 02
Robust detection of skew in document images
IEEE Transactions on Image Processing
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We propose a new skew detection algorithm, which is based on the lowest pixels of a set of characters. The skew angle is evaluated by applying moment calculation, and the method to get characters in one text-line is described in detail. Document images of various languages, including English and Chinese, can be validly treated by this algorithm. Both the document images with large skew angle and the document images containing a few characters can be treated by this algorithm.